30,60,45design fits most of cutting plotter. High quality and extra .Super wear Resistance,high hardness, Application:fit for and most domestic and plotter with higher hardness (HRA93)greater strength, tip more ,cutting plotter lettering faster Blades is material through the grinding polishing processing,high precision, good lettering quality; Full length: 23.5mm Shank diameter: 2mm Color: picture color Material: steel Package Content: 5* 30 degree yellow knife 5* 45 degree red knives 5* 60 degree blue knife 2* tool holder Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.